CVE Vulnerability

CVE-2021-41773

A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E Mailing List Vendor Advisory
https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/05/2 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/07/1 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html Exploit Third Party Advisory
https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E Mailing List Vendor Advisory
https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/07/6 Mailing List Third Party Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/1 Exploit Mailing List
https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E Mailing List Patch
http://www.openwall.com/lists/oss-security/2021/10/08/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/3 Exploit Mailing List
http://www.openwall.com/lists/oss-security/2021/10/08/6 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/08/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/09/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/11/4 Mailing List Patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/15/3 Mailing List Patch
http://www.openwall.com/lists/oss-security/2021/10/16/1 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html Exploit Third Party Advisory
https://security.netapp.com/advisory/ntap-20211029-0009/ Third Party Advisory
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html Exploit Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-20 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Information

Published : 2021-10-05 09:15

Updated : 2022-10-28 04:16

NVD link : CVE-2021-41773

Mitre link : CVE-2021-41773

Products Affected
No products.
CWE
CWE-22